When you visit Mexico you will see many people who are in need and you will want to help them. Please understand that their soul is of far more importance to God than any temporary material or financial assistance. Unless you speak Spanish fluently and are willing to share the gospel to where they fully understand, please leave your gift with the ministry you are visiting so they can make sure it is given with the gospel message. We make this suggestion from a principle in Acts where Paul took up an offering to be sent to Jerusalem and given to the elders to be distributed to the people. We believe this is the Biblical way of handling giving to those outside your close acquaintance and would ask that you follow this example when visiting Mexico.
And in these days prophets came from Jerusalem to Antioch. Then one of them, named Agabus, stood up and showed by the Spirit that there was going to be a great famine throughout all the world, which also happened in the days of Claudius Caesar. Then the disciples, each according to his ability, determined to send relief to the brethren dwelling in Judea. This they also did, and sent it to the elders by the hands of Barnabas and Saul. Acts 11:27-30